I tend to agree with bsn reference the BDC scope on a 30/06. A buddy put one (Nikon Buckmasters BDC) on a Tikka T3 in .270. I sighted it in for him and he promptly missed his first shot at a big Kentucky buck because he used the wrong aiming dot/circle.
He did shoot another nice, but smaller buck the next week at an even longer range, but only after reminding himself which aiming point to use! Neither shot required anything but a standard crosshair figuring a MPBR of almost 300yds.
By purchasing a slightly lower magnification scope such as a 3-9, you can also get a better quality scope, such as a Bushnell Elite, Burris FFII or the Nikon Buckmasters model. There's nothing wrong with a Prostaff, they are nice enough scopes, but all three of the others are better glass to my eye. I personally don't see a real need for magnification higher than 9X on an '06 and have several of mine scoped with 3-9, 2.5-8, 2-7, and even straight 4X scopes. Even when sighting in a rifle at 100yds, there is little to no difference in groups shot at 9X or at 4X, if you do your part.
Good Luck!
By purchasing a slightly lower magnification scope such as a 3-9, you can also get a better quality scope, such as a Bushnell Elite, Burris FFII or the Nikon Buckmasters model. There's nothing wrong with a Prostaff, they are nice enough scopes, but all three of the others are better glass to my eye. I personally don't see a real need for magnification higher than 9X on an '06 and have several of mine scoped with 3-9, 2.5-8, 2-7, and even straight 4X scopes. Even when sighting in a rifle at 100yds, there is little to no difference in groups shot at 9X or at 4X, if you do your part.
Good Luck!